Games like Aeternum
Games like Aeternum include TouHou Makuka Sai ~ Fantastic Danmaku Festival Part II, Touhou Koumakyou: New Classic - the Embodiment of Scarlet Devil, TouHou Makuka Sai ~ Fantastic Danmaku Festival, Touhou Fuujinroku ~ Mountain of Faith., and Bit Blaster XL. We matched them by the tags players give Aeternum on Steam (Action, Indie, Bullet Hell, Shoot 'Em Up, and Anime): closest matches first, and among equally close ones the better-known games.
TouHou Makuka Sai ~ Fantastic Danmaku Festival Part II
Shared: Indie · Bullet Hell · Shoot 'Em Up
Touhou Koumakyou: New Classic - the Embodiment of Scarlet Devil
Shared: Bullet Hell · Shoot 'Em Up · Action
TouHou Makuka Sai ~ Fantastic Danmaku Festival
Shared: Indie · Action · Bullet Hell
Touhou Fuujinroku ~ Mountain of Faith.
Shared: Action · Indie · Bullet Hell
Bit Blaster XL
Shared: Bullet Hell · Shoot 'Em Up · Difficult
Touhou Kouryudou ~ Unconnected Marketeers.
Shared: Action · Bullet Hell · Shoot 'Em Up
Touhou Tenkuushou ~ Hidden Star in Four Seasons.
Shared: Bullet Hell · Shoot 'Em Up · Indie
Touhou Kikeijuu ~ Wily Beast and Weakest Creature.
Shared: Indie · Bullet Hell · Action
BLUE REVOLVER
Shared: Indie · Bullet Hell · Action
Touhou Chireiden ~ Subterranean Animism.
Shared: Action · Indie · Bullet Hell
Cuphead
Shared: Difficult · Indie · Bullet Hell
Enter the Gungeon
Shared: Bullet Hell · Indie · Difficult
Touhou Kanjuden ~ Legacy of Lunatic Kingdom.
Shared: Bullet Hell · Indie · Difficult
Star of Providence
Shared: Bullet Hell · Indie · Shoot 'Em Up
Revolution Ace
Shared: Action · Indie · Shoot 'Em Up
LUFTRAUSERS
Shared: Indie · Bullet Hell · Action
Bullet Heaven 2
Shared: Action · Bullet Hell · Indie
ZeroRanger
Shared: Indie · Shoot 'Em Up · Bullet Hell
Touhou Blooming Chaos 2
Shared: Action · Indie · Bullet Hell
Maiden and Spell
Shared: Action · Indie · Bullet Hell
UBERMOSH:WRAITH
Shared: Action · Indie · Anime
Star Saviors
Shared: Action · Bullet Hell · Shoot 'Em Up
Ikaruga
Shared: Bullet Hell · Shoot 'Em Up · Action
Rabi-Ribi
Shared: Bullet Hell · Anime · Indie